code: def no_nulls_df():
      return pd.DataFrame(
          {"text": ["a", "b", "c", "d"], "numbers": range(1, 5)}
      )
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 12 for calling a global function with example usage: no_nulls_df() and returns: pd